Charleston, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Charleston, IL in one place.
Sunny, with a high near 91. Southwest wind 8 to 12 mph, with gusts as high as 18 mph.
Local Weather Overview
This forecast page for Charleston, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 13, 2026 10:32 AM CDT.
The active forecast window currently covers Oct 13 to Oct 19, 2026 for Charleston, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 13 to Oct 19, 2026
- Latest sync
- Oct 13, 2026 10:32 AM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Charleston
Today looks like the warmest upcoming period in Charleston at 91 degrees F.
Saturday Night is the coolest period ahead with temperatures near 35 degrees F.
The strongest winds are forecast for Friday at about 17 to 21 mph NNW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 10:32 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of showers and thunderstorms between 3am and 5am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 71. Southwest wind 3 to 7 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a high near 78. Northwest wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Northeast wind around 6 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of rain showers before 7am, then showers and thunderstorms. Mostly cloudy, with a high near 78. South southeast wind around 8 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a low around 49. West wind 8 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 60. North northwest wind 17 to 21 mph, with gusts as high as 31 mph. New rainfall amounts less than a tenth of an inch possible.
Areas of frost after 5am. Mostly clear, with a low around 36.
Areas of frost before 8am. Sunny, with a high near 61.
Clear, with a low around 35.
Sunny, with a high near 69.
Mostly clear, with a low around 44.
Mostly sunny, with a high near 73.
Partly cloudy, with a low around 49.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Oct 13
|
Sunny
|
91°F |
8 to 12 mph
SW
|
|
Tonight
Oct 13
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
71°F |
3 to 7 mph
SW
|
|
Wednesday
Oct 14
|
Showers And Thunderstorms
|
78°F |
5 mph
NW
|
|
Wednesday Night
Oct 14
|
Chance Showers And Thunderstorms
|
63°F |
6 mph
NE
|
|
Thursday
Oct 15
|
Showers And Thunderstorms
|
78°F |
8 mph
SSE
|
|
Thursday Night
Oct 15
|
Showers And Thunderstorms
|
49°F |
8 to 17 mph
W
|
|
Friday
Oct 16
|
Slight Chance Rain Showers then Mostly Sunny
|
60°F |
17 to 21 mph
NNW
|
|
Friday Night
Oct 16
|
Mostly Clear then Areas Of Frost
|
36°F |
6 to 15 mph
N
|
|
Saturday
Oct 17
|
Areas Of Frost then Sunny
|
61°F |
5 mph
NE
|
|
Saturday Night
Oct 17
|
Clear
|
35°F |
3 mph
SE
|
|
Sunday
Oct 18
|
Sunny
|
69°F |
5 to 9 mph
S
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
44°F |
7 mph
S
|
|
Monday
Oct 19
|
Mostly Sunny
|
73°F |
8 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
49°F |
5 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Charleston.
